Top roll assembly for spinning frames

ABSTRACT

A TOP ROLL ASSEMBLY FOR SPINNING FRAME COMPRISING AN ELONGATED ARBOR, A ROLLER ASSEMBLY ROTATABLY MOUNTED AT OPPOSITE AXIAL ENDS OF SAID ARBOR, EACH ROLLER ASSEMBLY INCLUDING A NEEDLE ROLLER BEARING, AN ELONGATED CYLINDRICAL ARBOR SLEEVE PRESS FITTED ON THE SHELL OF THE NEEDLE ROLLER BEARING, A COT MADE OF A RESILIENT MATERIAL SECURED TO THE OUTER PERIPHERAL SURFACE OF SAID ARBOR SLEEVE, A PLURALITY OF WASHER ELEMENTS CONFRONTING ONE AXIAL END OF THE NEEDLE ROLLER BEARING AND DISPOSED INTERIORLY OF SAID ARBOR SLEEVE, A RUBBER PLUG MOUNTED IN THE OPPOSITE AXIAL END OF THE SAID ARBOR SLEEVE AND A CAP MEMBER PRESS FITTED IN THE OUTER END OF SAID ARBOR SLEEVE OVER SAID PLUG.

Oct. 19; 1971 P. E; DUQUETTE TOP ROLL ASSEMBLY FOR SPINNING FRAMES F red July 16, 1969 United States Patent Office 3,613,199 Patented Oct. 19, 1971 3,613,199 TOP ROLL ASSEMBLY FOR SPINNING FRAMES Paul E. Duquette, 108 Homestead Drive, Doylestown, Pa. 18901 Filed July 16, 1969, Ser. No. 848,258 Int. Cl. B21b 13/02 US. Cl. 29-116 2 Claims ABSTRACT OF THE DISCLOSURE A top roll assembly for a spinning frame comprising an elongated arbor, a roller assembly rotatably mounted at opposite axial ends of said arbor, each roller assembly including a needle roller bearing, an elongated cylindrical arbor sleeve press fitted on the shell of the needle roller bearing, a cot made of a resilient material secured to the outer peripheral surface of said arbor sleeve, a plurality of washer elements confronting one axial end of the needle roller bearing and disposed interiorly of said arbor sleeve, a rubber plug mounted in the opposite axial end of said arbor sleeve and a cap member press fitted in the outer end of said arbor sleeve over said plug.

The present invention relates to improvements in spinning frames and more particularly to a new and improved top roll assembly for spinning frames.

Spinning frames are used to reduce yarn in size and in the process, yarn is unwound over end from a package by a series of feed and draft rolls and rewound on a rotating spool, a conventional ring traveler imparting a twist to the yarn. The series of roll assemlies usually includes a first set of feed rolls and a series of pairs of draft rolls spaced from the feed rolls, the several pairs having different peripheral speeds in order to effect a progressive drawing of the yarn passing therebetween. The bottom rolls of each of these assemblies are the driven rolls and are usually mounted on fixed centers whereas the top roll assemblies are mounted for adjusting movement so that the relative pressure between the rolls may be selectively varied.

The present invention is directed to an improvement in top roll assemblies for a spinning frame and is charac terized by novel features of construction and arrangement providing several advantages over conventional top roll assemblies, such as overall manufacturing and assembly costs reduction, ease of assembly, elimination of certain machining and heat treating operations, and reduction in material costs. Additionally, the present invention provides a novel lubrication arrangement for top roll assemblies.

These and other objects of the present invention and the various features and details of the operation and construction thereof are hereinafter more fully set forth with reference to the accompanying drawing, wherein:

FIG. 1 is a schematic illustration of one of the stations of a spinning frame;

FIG. 2 is an enlarged fragmentary section as viewed from the line 22, FIG. 1, showing a top roll assembly constructed in accordance with the present invention (shown partly in section so that the internal construction may be more readily understood);

FIG. 3 is an exploded perspective view of the parts comprising the top roll assembly of the present invention; and

FIG. 4 is a fragmentary sectional view of a modification in the top roll assembly illustrated above.

Referring now to the drawings and particularly to FIG. 1 thereof, there is illustrated schematically one of a plurality of stations of a spinning frame. As illustrated therein, yarn Y which is drawn over end froma package 10 supported on a bracket forming part of the main frame of the machine, passes around a guide bar 12 to the nip of a series of rolls. The series includes a first pair of feed rolls 14 and a series of two pairs of space draft rolls 16 and 18 through which the yarn is drawn and stretched and passes to a ring traveler 20 which in turn is mounted on a reciprocating ring frame 2 which moves axially relative to a spool 23 to effect twisting and laying of the yarn on the spool 23. The bottom rolls 14a, 16a and 18a of the feed and draft rolls are usually driven and mounted for rotation about a fixed center in the frame. The top roll assemblies 14, 16 and 18 comprise a series of assemblies of the type illustrated in FIG. 2 which are carried by a support arm 28 mounted on a shaft secured to the main frame of the machine.

Considering now the details of construction of the top roll assembly constructed in accordance with the present invention, the assembly includes an elongated arbor or shaft 30 made of a suitable alloy steel, for example AISI 4140 or any other steel with a natural Brinell hardness of between 220230. The shaft 30 may also be made of a heat-treated carbon steel. The center of the arbor is splined as at 32 so that a resting sleeve 34 may be press fitted thereon for assembling the top roll set to the arm 28 of the mounting assembly. The top roll assembly further includes a pair of rotatably mounted resilient rollers which cooperate with the resilient cover of the fixed center bottom rolls to engage the yarn Y in the nip thereof as illustrated in FIG. 2. Each of these roller assemblies at opposite ends of the arbor are identical and accordingly bear the same reference numerals. Accordingly, each roller assembly comprises a conventional needle bearing 42 consisting of an outer shell 44 and a plurality of rollers 46. The needle bearing assembly is located in a predetermined position relative to the end of the arbor by means of a spacer 48 one end of which abuts the resting sleeve 34, a washer 50 made for example of phosphorous bronze, in the present instance a series of felt washers 52, a second metallic washer 54 and a lock ring 56 which engages in a groove 58 adjacent the axial end of the arbor or shaft 30.

The assembly further includes an arbor sleeve 60, made for example of carbon steel which is not heat treated having a predetermined inner diameter in relation to the shell of the needle bearing so that it may be press fitted thereon in the manner illustrated in FIG. 2. The outer periphery of the arbor sleeve 60 may be knurled to facilitate mounting of the rubber cot covering 62 by means of a suitable adhesive 64. In lieu of knurling the outer peripheral surface of the arbor sleeve 60, a series of concentric axially spaced grooves may be formed therein. The assembly further includes a rubber plug which frictionally engages in the outer axial end of the arbor sleeve 60 and a metallic cap 72 which is press fitted in the end of the arbor sleeve 60 over the plug 72. This cap 72 is provided with an opening 74 to facilitate insertion of the needle of a syringe for lubrication of the bearing as indicated in broken lines.

FIG. 4 shows a modified form of the top roll assembly illustrated above. The assembly is identical to the top roll shown in FIGS. 2 and 3 in all respects except that in the present instance the spacer sleeve 48 is eliminated and in lieu thereof a lock washer which engages in a groove 82 on the arbor or shaft 30a is provided to retain the felt washers in tight assembly against one axial end of the needle bearing.

The top roll assembly of the present invention is very easy to assemble. For example, initially the resting sleeve 34 is press fitted in the arbor so that it is disposed centrally thereof. Thereafter a needle roller bearing assembly 42 is press fitted in an arbor sleeve 60 so that it is disposed approximately centrally thereof. Two spacers 48 are then mounted over the shaft 30 from opposite axial ends thereof to the position shown in FIG. 2. The phosphorous bronze washers 50 are then mounted in abutting relation to thespacers followed by assembly of the felt washers 52. The inner bronze washers 50a are then assembled over the shaft and thereafter the needle bearing 42 and arbor sleeve 60 are mounted in place. It is noted that the arbor sleeve may be rotated to facilitate assembly over the felt washers 52 since these washers are of a slightly greater diameter than the internal diameter of the sleeve 60. The lock ring 56 is then assembled by means of a suitable tool. The rubber plug 70 is then mounted in the outer end of the arbor sleeve 60 followed by press fitting of the cap 72 in the manner illustrated in FIG. 2. Thereafter, the bearing at each end is lubricated by inserting a hypodermic through the opening 74 provided in the end caps 72.

I claim:

1. A top roll assembly for a spinning frame comprising an elongated arbor, a roller assembly rotatably mounted at opposite axial ends of said arbor, said arbor being made of a steel with a Brinell hardness of between 220- 230, each roller assembly including a needle roller bearing, an elongated cylindrical arbor sleeve press fitted on the shell of the needle roller bearings, a cot made of a resilient material secured to the outer peripheral surface of said arbor sleeve, a plurality of washer elements confronting one axial end of the needle roller bearing and 4 disposed interiorly of said arbor sleeve, a rubber plug mounted in the opposite axial end of saidarbor sleeve and a cap member press fitted in the outer end of said arbor sleeve over said plug, a resting sleeve mounted on said arbor centrally thereof and including a pair of cylindrical spacer elements on opposite sides of said resting sleeve, a lock ring engagable in a groove at each opposite axial end of the arbor for properly positioning the roller bearing and washer elements.

2. A top roll assembly as claimed in claim 1 wherein said washer elements include a plurality of felt washers and a metallic washer at opposite ends of said stack of felt washers.

References Cited UNITED STATES PATENTS 2,355,510 8/1944 Cobb 29-116 2,355,511 8/1944 Cobb 29116 2,441,495 5/1948 Lee 308187.1 2,630,356 3/1953 Johnson 308-187.1 2,684,274 7/1954 Saxon 308187.1 2,727,280 12/1955 Waite 29-116 X 2,885,247 5/1959 Schlums 29116 X 3,380,138 4/1968 Steichele 291 16 FOREIGN PATENTS 1,394,730 3/1965 France 29-116 ALFRED R. GUEST, Primary Examiner UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Pate 3.613.199 Dated October 19. 1971 Inventor(s) PAUL E. DUQUETTE It is certified that error appears in the aboveidentified patent and that said Letters Patent are hereby corrected as shown below:

Serial No. 848,258 should read "842,258-- Signed and sealed this 11th day of July 1972.

SEAL) Attest:

EDWARD MFLE TCI-EER JR. ROBERT GOITSCHALK Attes ting Officer Commissioner of Patents ORM PO-1050 (10-69) USCOMM-DC OO376-PO9 0 US. GOVERHMENY PRINTING OFFICE '9, 0-381-834 

